Gyratory crusher with upper inlet opening



April 26, 1960 A. THOMAS GYRATORY CRUSHER wm-x UPPER INLET OPENING 2 Sheets-Sheet 1 Filed Jan. 5, 1958 Fig. 7

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2 Sheets-Sheet 2 INVENTOR.

April 26, 1960 A. THOMAS GYRATORY CRUSHER WITH UPPER INLET OPENING Filed Jan. :5, 1953 10 5 r$ l k/0d a i a I Suzy/1.0 wwgaz w United States Patent 2,934,277 GYRATORY CRUSHER WITH UPPER INLET OPENING Adolf Thomas, Duisburg, Germany, assignor to Esch- Werke K.G., Duisburg, Germany Application January 3, 1958, Serial No. 707,039 Claims priority, application Germany October 24, 1957 4 Claims. (Cl. 241-156) The invention relates to a gyratory crusher with an upper inlet opening, into which projects the upper end of the spindle or main shaft of the breaking head.

Customarily, the inlet opening is delimited by a head ring which conically widens in upward direction, is put on the breaking mantle and arranged concentrically with respect to the axis of the breaking mantle.

The width of the inlet opening, i.e. the internal distance between the head ring and the main shaft or the bearing of it, determines the maximal size of the particles to be crushed which can be treated by the crusher. In order to increase the maximal size of the introduced material by a certain amount the diameter of the inlet opening is to be enlarged by the double of this amount, so that, for higher sizes of the particles to be crushed, as they are desired for material of stone-pits or the like, widely projecting and expensive constructions are necessary.

This is particularly disadvantageous with constructions where the upper end of the main shaft is mounted in a ball and socket joint which is supported by a spider, since the spider is put on the rim of the head ring and, in consequence of the enlarged span, is substantially to be reinforced.

In utilising the circumstance that the introduction of the material to be crushed mostly takes place from one side of the crusher and in order to avoid the said disadvantage, according to invention, the inlet opening is enlarged in that the upper opening of the head ring of the crusher is made unsymmetrically and displaced towards one side of the axis of the breaking mantle.

By this arrangement a substantial enlargement of the width of the inlet opening is obtained without enlarging the diameter or the circumference of the head ring.

When the said spider is present, the greater part of the inlet opening is located at the one side of the spider, so that the spider is placed along a chord, which is substantially shorter than the diameter, with the result that the spider having the same bearing-power, can be made of slighter dimensions.

Further features of the invention follow from the following description of an example of embodiment of the invention.

In the accompanying drawing:

Fig. 1 is an elevation view partly broken away of a crusher according to the invention.

Fig. 2 is a top view appertaining theretd.

Fig. 3 is a top view of another example of embodiment.

The main shaft 1 of the breaking head is limitedly and towards all sides rockably mounted about the point 3 at the upper end in a ball and socket joint 2. The ball socket 4 is carried by a strong two armed spider 5, which is supported at its ends on the rim of a head ring 6 of the crusher. At the lower end of the head ring the breaking shell 7 is attached, which is lined with the breaking mantle 8, within which the breaking head 9 mounted on the main shaft accomplishes gyrating movements. The latter are effected in the way that the lower end of the main shaft is guided in an eccentric sleeve 11, which is put into rotation by a drive shaft 12 through a bevel gearing. The axis 13 of the main shaft and with it the breaking head is moved thereby on the surface of a slight co'ne around the axis 14 of the breaking mantle.

Patented Apr. 26, 1960 Now, the head ring 6 is not arranged concentrically to the axis of the breaking mantle, as is customary, but, as

so that the greater part 15 (Fig. 2) of the upper opening I of the head ring is situated at the one side of the spider 5. The inner wall 16 (Fig. 1) of the head ring at the inlet opening 15 changes co'nically into the breaking mantle 8. It will be seen that in this way a comparatively wide inlet opening is formed, which can receive material to be crushed of corresponding great size. If with the hitherto usual concentrical arrangement of the head ring, the same size of the material should be obtained, the head ring ought to be provided with a circumference according to the circle drawn with dash and dot lines in Fig. 2.

The two armed spider 5 extends along a chord of the entire opening of the spider ring so that it is shorter than if it would extend along a diameter. Therefore it can withstand the same bearing power having slighter dimension.

In order to strengthen the supporting of the ball and socket joint a cross arm 18 between the rim of the head ring and the ball and socket joint is provided for within the smaller part 19 of the opening of the head ring. This opening also may be completely closed. Fig. 3 shows an embodiment of the head ring, which is provided with two oppo'sitely arranged inlet openings 15, 15 of the same size for the case that the delivering of the material must be brought about from both sides or selectively from the one or the other side. Also in this case the advantage is obtained that the spider is shorter.

What I claim is:

1. In a gyratory crusher of the class described, a breaking head, a main shaft carrying said breaking head, a breaking mantle surrounding said breaking head having circular cross sectio'ns in all horizontal planes along its vertical axis, a head ring separably lodged on the upper end of said breaking mantle, said head ring supporting a two armed spider carrying a ball and socket bearing mounting the upper end of said main shaft, means for gyratorily driving said main shaft located at the lower end of the main shaft the upper opening of said head ring being unsymmetrically displaced towards one side with respect to the axis of the breaking mantle, said main shaft having an upper free end below said ball and socket bearing situated in the reach of said head ring, the outwardly displaced portion of the inner wall of said head ring having an angle with respect to the wall of said upper free end of the main shaft that permits fore-crushing of particles of a higher size than that can be crushed between the breaking mantle and the breaking head.

2. In a crusher according to claim 1, said spider being lo'dged along a chord of the circular inlet opening.

3. In a crusher according to claim 1, a cross arm between the spider and the head ring within the small portion of the opening of the head ring, whereby the ball and socket joint will be additionally supported.

4. In a crusheraccording to claim 1, said smaller portion of the upper opening of the head ring being enlarged in transversal directio'n corresponding to the length and width of the large portion, whereby two inlet openings are formed at opposite sides of the crusher.

References Cited in the file of this patent UNITED STATES PATENTS 759,643 Sturtevant May 10, 1904 997,918 Jones July 11, 1911 2,186,596 Spohn Jan. 9, 1940 2,188,666 Spohn Jan. 30, 1940 2,656,120 Roubal Oct. 30, 1953 

